mnl: Fix -Wimplicit-function-declaration warnings

This change fixes the following warnings:

mnl.c: In function ‘mnl_nft_flowtable_add’:
mnl.c:1442:14: warning: implicit declaration of function ‘calloc’ [-Wimplicit-function-declaration]
  dev_array = calloc(len, sizeof(char *));
              ^~~~~~
mnl.c:1442:14: warning: incompatible implicit declaration of built-in function ‘calloc’
mnl.c:1442:14: note: include ‘<stdlib.h>’ or provide a declaration of ‘calloc’
mnl.c:1449:2: warning: implicit declaration of function ‘free’ [-Wimplicit-function-declaration]
  free(dev_array);
  ^~~~
mnl.c:1449:2: warning: incompatible implicit declaration of built-in function ‘free’
mnl.c:1449:2: note: include ‘<stdlib.h>’ or provide a declaration of ‘free’

Signed-off-by: Michal Rostecki <mrostecki@opensuse.org>
Acked-by: Phil Sutter <phil@nwl.cc>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>

1 files changed, 1 insertions, 0 deletions

diff --git a/src/mnl.c b/src/mnl.c
index fdba0af8..aa5b0b46 100644
--- a/src/mnl.c
+++ b/src/mnl.c
@@ -30,6 +30,7 @@
 #include <arpa/inet.h>
 #include <fcntl.h>
 #include <errno.h>
+#include <stdlib.h>
 #include <utils.h>
 #include <nftables.h>